Hammock



FIG. 1 is a front perspective view of a new design for a hammock;

FIG. 2 is a front view of the hammock illustrated in FIG. 1;

FIG. 3 is a top view of the hammock illustrated in FIG. 1;

FIG. 4 is a bottom view of the hammock illustrated in FIG. 1; and,

FIG. 5 is a left side view of the hammock illustrated in FIG. 1, the right side view being a mirror image of the left side view;

The portion of the article depicted in broken lines is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a hammock, as shown and described. 